Container



July 3 0, 1940. c. K. DUNLAP CONTAINER Filed May s, 1938 Cfiarles 1K.JzwzZa v,

Mew-q Patented July 30, 1940 v v 2,209,448"

PATENT oFFrcs "Sonoco'Products Company, Hartsville, S. 0., a"corporation of South Carolina Application May a, 1938, Serial No.-205,823 4 Claims. (01. 229-55) This invention relates to, containers,for the tainer. Where oils are to be packaged and dispackag'ing,transportation and dispensing of pensedthis coating composition maycomprise commodities and particularly to containers fabglue and I selectglue in order to make use of ricated of paper and primarily intended fordisthis coating as the means for attaching the I pensing of liquids suchas lubricating oils. flanges of the bottom discs to the inner wall 5 Ithas heretofore been suggested that paper of the container and also asthe means for atcontainers of self-supporting type and conical intachment of the bulkhead or partition to such form mightadvantageouslybe employed for the inner wall, thus simplifying theprocess of manupackaging and dispensingof lubricatingv oils. A factureand making it possible to produce a paper container, after beingemptied, can of container of the type above described at lowest coursebe readily disposed of .by burning and possible cost. where the papercontainer-is conical in form it Two such containers are illustrated inthe accomprises a convenient pouringfunnel, in itself, companyingdrawing by way of. example. It after its nose or apex has been severed.,Howwill be appreciated-by those skilledin the art I ever, this type ofcontainerhas never been comthat certain features of the invention may be16 mercially used,'one difficulty being to so fabriincorporated incontainers which are not truly cate it that leaks will not developduring transconical, as for instance in cylindrical paper conportationand handling. A primary purpose. of tainers, although primarily theinvention is dithe present invention is to providea paper conrected tothe production of an inexpensive and tainer of the conical type whichmaybe ecothoroughly satisfactory paper container of the 20 nomicallyfabricated, isself-supporting .at all conical type. times, and whichwill'withstand the shock and In the drawing: I abrasion incident torough handling without de- Figure 1 is a side elevation of a container,parveloping leaks. One feature or, the improved tially broken away, todisclose the bulkhead and 1 container is the provision of a transversepartibottom construction; and I, v 5 tion or bulkhead within thecontainer and closely Figure 2 is a similar view, partially brokenadjacent the nose or apex thereof, this partition away to show aslightly difierent type of bottom dividing the container into twonon-communicatconstruction. ing compartments, a major compartment in.The conical body portion of the container is which the liquid commodityis placed, and a indicated at l0, the transverse bulkhead or par- 0minor compartmentadjacent the apex which is tition at H, the bottom orend closure being genentirely empty. It is the apex of the containererally indicated at l2. The body portion I0 is which is most likely tofail or develop leaks when fabricated by winding upon v a conicalmandrel the container is roughly handled and, by the proa generallysemi-circular paper blank which has vision of the-bulkhead or partitionreferred to, preferably previously been coated with a suitable theliquid contents of the major compartment adhesive, the resulting conebeing two or more lsprevented from escaping even though the apex pliesin thickness and the several plies being 1 may have become severelydamaged; secured together by the adhesive appliedprior It is also amatter of some practical difiiculty to the winding operation. The coneis trimmed U) provide a closure for the larger end or bottom at itslarge end in the customary manner and of such a container whichadequately retains its after it has dried its small end or apex isrounded liquid contents at all times and it is a further and closed, forinstance by pressing the same object of the invention to provide animproved against a rapidly rotating die. If this closing bottomconstruction for a tubular container prioperation is properly efiectedthe annular edge ma'rily intended for liquids. This bottom conof thebody at the small end will be laterally and ltruction comprisesessentially two discs, each inwardly deflected and caused to merge intoa provided with a peripheral flange, the discs being continuousstructure, exteriorly polished and positioned in face to facerelationship with the ordinarily strong and well able to withstandsubfianges extending in opposite directions axially stantial shockwithout damage. After the conof the container, these flanges beingattached to tainer is charged with the liquid, however, it is theconical inner surface of the container by a comparatively heavy and, ifdropped for any suitable adhesive. A paper container for liquidsdistance in such manner that it falls with its must be necessarilyinteriorly coated with some apex end downwardly so as to strike a solidcoating composition which prevents penetration object, there is a stronglikelihood that its apex of the liquid into the fibrous walls of the0011- will be opened to permit the escape of the conp,

tained liquid. In order, therefore, that no such escape of liquid mayoccur even though the nose or apex of the container be severely damaged,the bulkhead II is inserted. This bulkhead preferably comprises a paperdisc having a continuous peripheral frusto-conical flange, the outersurface of which is adapted to seat against the inner surface of thecontainer body "I. It is spaced rather closely to the apex end of thecontainer and divides the container into two compartments, a minorcompartment which lies above the bulkhead and a major compartment whichlies below. The normal level of the liquid in the container may be asindicated by the line l3.

The bottom closure comprises two paper discs I4 and I5, disposed inclose parallel relationship,

- and each having a continuous peripheral frustoconical flange, theouter surface of which is adapted to closely engage the conical innersurface of the body "I, these flanges extending in opposite directionsaxially of thecontainer. As will be observed, the margin of containerbody ill, at its base or large end, is inwardly and upwardly deflectedso as to envelop and retain the peripheral flange of the lower bottomdisc ll. The discs are provided with registering apertures H and I5through which the liquid to be packaged may be introduced when thecontainer, as thus far assembled, is inverted. After'charging, thischarging opening may be closed by a circular disc such as indicated atIt in Figure 1 or a paper plug such as indicated at 20 in Figure 2.

All surfaces of the container which are or may possibly be exposed toits liquid contents are, prior to charging, coated with a coatingsubstance or material, resistant to the action of the contained liquid,to prevent penetration of the liquid into the fibrous walls of the papermembers which, together, comprise the container. Where oils are used thecoating substance may conveniently be glue, which will resist the actionof oils, and glue is used preferably inasmuch as it likewise comprisesan adhesive by means of which the bulkhead II and the bottom discs ll 5and I 5 may be attached to the inner wall suris applied to the entireinner surface of this cone or body. The bulkhead or partition member IIis dipped in the leak-proofing substance and inserted in the cone untilpositioned as shown in Figure l. The bottom members l4 and I 5 are vlikewise dipped in the coating material just prior to insertion withinthe large end of the cone.

Hence all surfaces of the container are coated and, inasmuch as thepartition II and bottom members l4 and I5 are applied to the body IIIwhile the coating composition thereon is still in liquid conditiomthecoating composition itself likewise comprises a bonding material forsecuring these members in position. The closure disc I6 is likewisedipped in the coating material prior to' application and, in the eventthat a closure cap such as indicated at 20 in- Figure 2 is applied, thisis also dipped prior to application.

The bulkhead member Il may be inserted through the -fllling openingafter the bottom members l4 and I5 have been applied, if desired.Preferably the lower margin-of the-body ID, or the margin of thisconical body immediately adjacent its large end, is inturned after thecoating material has completely dried After charging and closing of thecontainer it may be coated exteriorly, on all surfaces, with a coatingcomposition, to prevent the penetration of moisture into the exposedsurfaces of the container,

which would tend to weaken the wall of the con-- tainer. Having thusdescribed the invention, what is claimed as new. and desired to besecured by Letwhich serves to prevent passage of liquid to said apex.

2. A container for liquids comprising a hollow multi-ply conical paperbody the apex of which has been rounded over and closed by pressure,

- and a. partition within the said body closely adjacent the apexthereof to retain the liquid contents in the event that the apex closureis damaged.

3. The combination set forth in claim 2 in which the partition membercomprises a paper disc with a frusto-conical flange, the outer surfaceof said flange bearing closely against the inner surface of said bodyand being attached thereto by an adhesive.

4. The method of making paper containers which comprises separatelyforming a conical body portion and a plurality of spaced circularpartitions or bulkheads, each of a diameter equal to that of thecircular section of the cone of the body portion at which they are to bedisposed, coating the interior surface of the body with a leak-proofingsubstance of adhesive nature,.and successively inserting the bulkheadsup to their limit of movement with the cone and into contact with theadhesive covered interior surface whereby they are secured thereto bymeans of said coating substance. I

' CHARLES K. DUNLAP.

